Tuning the magneto-optical Kerr effect by the nanograting cross section

被引：8
|
作者：
Tang, Zhixiong
Zhu, Ruxian
Chen, Leyi
Zhang, Cheng
Zong, Zhenxing
Tang, Shaolong [1 ]
Du, Youwei
机构：
[1] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing Natl Lab Microstruct, Jiangsu Key Lab Nanotechnol, Nanjing 210093, Jiangsu, Peoples R China
来源：
OPTICS LETTERS | 2019年 / 44卷 / 07期
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
REFRACTIVE-INDEX SENSORS; FANO RESONANCES; TRANSMISSION; CRYSTALS; GRATINGS; FIGURE;
D O I：
10.1364/OL.44.001666
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The magneto-optical Kerr effect, especially the Kerr slope, is of great significance to magneto-optical devices. Herein, we developed a method to tune the magneto-optical effect by the nanograting cross section. Both the simulation and experiment confirm that the resonance strength of the plasmon can be modulated by the nanograting cross section, resulting in the large Kerr slope and Kerr rotation. By designing the nanograting cross section, we obtained the Kerr slope of 0.397 degrees/nm, which is 4 orders of magnitude higher than the reported results. And the Kerr rotation of the magnetic nanograting reaches up to 1.218 degrees, which is 24 times higher than the flat Co film. Such a huge enhancement on the Kerr slope and the Kerr rotation may have profound applications in magneto-optical devices in the future. (C) 2019 Optical Society of America
引用
收藏
页码：1666 / 1669
页数：4
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